Members of CIA (Center for Isotope Analysis)

Current Postdoctoral Scholar:

Dr. Timothy Hahn received his Ph.D. at Washington University in St. Louis in 2019. His Ph.D. research emphasized comparative planetology among differentiated bodies, including the Moon and Vesta, through photometric investigation of planetary surfaces and sample analysis of representative achondrites (i.e., lunar and HED meteorites). Specifically, his research focused on exploiting “big data” in geological and planetary science through a combination of 1) statistical analysis of compositional data;  2) high performance computing and numerical modeling; and 3) geostatistical analysis of spacecraft-derived datasets. His current research at ASU focuses on using nominally anhydrous minerals (e.g., olivine, pyroxene, and plagioclase) as probes into primordial volatiles in the early Solar System through investigation of achondrite parent body crusts and mantles. Timothy’s research utilizes the Cameca NanoSIMS 50L and Cameca IMS 6f SIMS at ASU. His research will also work to develop high-quality ion implant standards for measuring volatile concentrations and D/H in nominally anhydrous minerals.

Current Graduate Student:

Brendan Chapman joined the Center for Isotope Analysis in Fall 2019 after earning his bachelor’s degree in Earth Science with a Planetary Focus from the University of California, Santa Cruz. His research interests include geochemistry and cosmochemistry, planetary exploration, and mineralogy, and his happiest place is looking at meteorites through a microscope of any kind. Brendan’s undergraduate research involved identifying evidence of impact deformation in asteroid parent bodies by EBSD (electron backscatter diffraction) analysis of equilibrated ordinary chondrites. For his Ph.D. research at ASU, Brendan will determine the capacity of NAMs (nominally anhydrous minerals) in Hayabusa samples from asteroid Itokawa and carbonaceous chondrites to store water using the Center for Isotope Analysis’ Cameca NanoSIMS 50L. He will also investigate several key processes that dictate the loss and transport of water in the inner solar system

Current Undergraduate Students:

Jack Schulte – He is a senior studying Physics and Astrophysics. He is a member of Barrett, the Honors College. He is also a NASA Space Grant recipient (2018-2020). His main interests include stellar and planetary astrophysics, especially the study of presolar grains in meteorites. He is a private pilot and works part-time as an aircraft manager at Scottsdale Airport. He also owns a small reflecting telescope and spends an occasional night observing and photographing the Moon and neighboring planets.

Ethan Duncan – He is a senior majoring in Astrophysics and minoring in Physics. He is also a NASA Space Grant recipient (2019-2020). He is a member of Barrett, the Honors College. He is interested in stellar and planetary Astrophysics especially in the formation of exospheres by particle bombardment on planetary surfaces. He has recently been trying his hand at astrophotography with a small refracting telescope on the weekends. He also performs part-time at Jesterz Improv Comedy Club at Mesa Riverview.

Victoria Froh – She is a junior double majoring in Chemistry and SESE. She is in the Honors College and is a Gammage Scholar through Barrett. She is interested in the chemical origins/evolution of the universe. She is a captain of ASU’s Women’s Rugby team who competes D1 and finished top 16 in the nation in 2018. She is studying micrometeorites from Antarctica and is also designing a new website for my research group.

Thomas Redford – He is sophomore with a major in Math. His interests lie in understanding the formation of organic materials in stellar environments and in meteorites.

Lucas Reynoso – He is a sophomore studying Aerospace Engineering and minoring in Sustainability. He is in the Honors College and a National Hispanic Merit Scholar. His interests lie in studying the salts found on the dwarf planet, Ceres, and developing the methodology to prepare salts for NanoSIMS analysis without sample degradation. He also is an avid cyclist and pianist and can be found making beats in his free time.

Kathleen Muloma – Kathleen has B.S. in Chemistry from Hope College. Her research interest mainly center on laboratory astrophysics and astrochemistry, with an emphasis on ice chemistry and gas-grain interface during planet and star formation. As a Simons-NSBP associate scholar, she will work on understanding how new nova models fit the isotopic composition data of stardust grains. Kathleen is dedicated to equity and justice for Black, Brown, and Queer communities both in and out of academic spaces. She loves to cook, read, sing, and connecting with new people.

Sonakshi Sharma – She is a Barrett sophomore double majoring in Biological Sciences and SESE with a concentration in Astrobiology. She is interested in the origins and organization of life in the universe, specifically in its correlation to organic matter and water found in extraterrestrial material. Currently, she’s developing a model that examines the thermal history of asteroids. She also enjoys baking bread, watching procedural crime shows, and listening to Grimes.

Jonas Hallstrom – He is a junior majoring in Physics. He is also a member of Barrett, the Honors College and a National Merit Scholar. He is interested in programming applications in physics and math, and in materials of all kinds, including extraterrestrial materials. He enjoys singing, board games, and cats.

Matthew Bryce Rombaoa – He is a sophomore at Barrett majoring in Biochemistry and minoring in Psychology. He is working with postdoctoral scholar Timothy Hahn to develop a model that examines nebular ingassing during planetary accretion. In his free time, he enjoys playing basketball, volleyball, and guitar.

Current Graduate Students (associated with CIA):

Zebadiah Teichert – He is a PhD student in SESE. His interest is in using lithium and boron to trace the thermal history of  terrestrial kerogen and shales to understand oil production.

Qian Yuan –  He is a PhD student in SESE and is studying lithium-isotope fractionation recorded in multiple episodes of humites during carbonate metasomatism.

Tyler Quigley – He is a PhD student in the School of Life Sciences. He is interested in understanding the dynamics of molecular transport across the blood-brain barrier of the honeybee worker.

Jonathan Zaloumis – His doctoral research is to understand preserved microbial fossils (fungi, prokaryotes, and stromatolites) in deep drill cores of serpentine from Omana that has strong implications for the sampling strategy for the upcoming Mars rover.

Melissa Sedlar – She is a PhD candidate and doing her second project on the origins of carbon in micrometeorites.

Ashley Herbst – She is a PhD candidate and doing her second project on the production of heavy and rear element isotopes in supernovae.

Past Postdoctoral Scholars and Students:

Dr. Ziliang Jin received his Ph.D. at the China University of Geosciences, Beijing. His PhD thesis project was to study the genesis of Skarn-type iron deposits, which supply the highest grade iron ores in China. He also worked as a guest scientist in the GeoForschung Zentrum (GFZ) SIMS lab in Potsdam, Germany. Since matrix-matched reference materials are critical for SIMS experiments, he worked on the Cameca IMS 1280HR instrument to develop and characterize reference materials, such as the synthetic glass, synthetic olivine, apatite and calcite. His current research work at ASU focuses on the study of water and hydrogen isotopic compositions in anhydrous minerals from the asteroid Itokawa and ordinary chondrites using the NanoSIMS 50L. The aim is to understand the origin and evolution of water in the first formed planetary bodies, i.e., asteroids, in the early solar system.

Dr. Kara Brugman – She is currently a postdoctoral scholar at the Carnegie Institute.

Dr. Hannah Shamloo – She is currently a NSF Earth Sciences Postdoctoral Fellow, working at Oregon State University and will be joining the faculty at Central Washington University as an Assistant Professor.

Sarah Dillon – She got her Masters degree and is currently working at Micron Technology Inc.

Rithvik Musuku worked in the summer of 2018 to find optimal ways of handling and mounting tiny (10-100 micron) particles. In the spring of 2020, he did his research on asteroid spectra using the AKARI database to find other asteroids like Psyche. This work was done while he was a high-school student from BASIS Chandler.